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-- this file provides an intermediary layer between the very simplistic c++ lua api and the
-- lua api used by bots and rules.
-- derived constants that can be useful
CONST_FIELD_MIDDLE = CONST_FIELD_WIDTH / 2 -- centre position
CONST_BLOBBY_GROUND_HEIGHT = CONST_GROUND_HEIGHT + CONST_BLOBBY_HEIGHT / 2
CONST_BALL_LEFT_BORDER = CONST_BALL_RADIUS -- minimum position of ball
CONST_BALL_RIGHT_BORDER = CONST_FIELD_WIDTH - CONST_BALL_RADIUS -- maximum position of ball
CONST_BALL_LEFT_NET = CONST_FIELD_MIDDLE - CONST_BALL_RADIUS - CONST_NET_RADIUS
CONST_BALL_RIGHT_NET = CONST_FIELD_MIDDLE + CONST_BALL_RADIUS + CONST_NET_RADIUS
CONST_BALL_TOP_NET = CONST_NET_HEIGHT + CONST_BALL_RADIUS + CONST_NET_RADIUS
CONST_BALL_BLOBBY_HEAD = CONST_GROUND_HEIGHT + CONST_BLOBBY_HEIGHT + CONST_BALL_RADIUS
CONST_BLOBBY_MAX_JUMP = CONST_BLOBBY_GROUND_HEIGHT + math.abs(CONST_BLOBBY_JUMP^2/CONST_BLOBBY_GRAVITY)
-- legacy functions
-- these function definitions make lua functions for the old api functions, which are sometimes more conveniente to use
-- than their c api equivalent.
-- gets x coordinate of current ball position
function ballx()
local x, y = get_ball_pos()
return x
end
-- gets y coordinate of current ball position
function bally()
local x, y = get_ball_pos()
return y
end
-- gets x component of current ball velocity
function bspeedx()
local x, y = get_ball_vel()
return x
end
-- gets y component of current ball velocity
function bspeedy()
local x, y = get_ball_vel()
return y
end
-- gets x component of blobby speed
function speedx( player )
local x, y = get_blob_vel( player )
return x
end
-- gets y component of blobby speed
function speedy( player )
local x, y = get_blob_vel( player )
return y
end
-- returns whether blobby is in the air
function launched( player )
local x, y = get_blob_pos( player )
return y > CONST_BLOBBY_GROUND_HEIGHT
end
-- gets the opponent of the player identification, i.e. LEFT_PLAYER <-> RIGHT_PLAYER
function opponent( player )
if player == LEFT_PLAYER then return RIGHT_PLAYER end
if player == RIGHT_PLAYER then return LEFT_PLAYER end
return -1
end
-- all combined
function balldata()
-- need x,y vars to expand to two results
local x, y = get_ball_pos()
return x, y, get_ball_vel()
end
-- this function mirrors pos around mirror
function mirror(pos, mirror)
return 2*mirror - pos
end
-------------------------------------------------------------------------------------
-- utilities
-- emulate ?: operator
function select(cond, a, b)
if cond then
return a
end
return b
end
function make_unsigned(num)
if num >= 0 then
return num
else
return math.huge
end
end
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